%0 Journal Article %A V. A. Yudin %T Riesz transforms and partial derivatives %J Sbornik. Mathematics %D 1991 %P 445-451 %V 69 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1991_69_2_a7/ %G en %F SM_1991_69_2_a7